I'm currently growing in a space almost exactly like yours (You can see in my journal), the comments about needing more flowering room is spot on. I currently clone, store mothers, and veg on one side, and flower on the other. I use a 270w in veg and a 300w in flower (Had a 1000w but it gave off more heat that a new boiler).
My biggest issue is being limited to two flowering plants and trying to find space to train the next flowering group in the same space Im trying to store clones and mothers.
Changing out nutes (DWC) is a creative challenge on drainage and replacement.
When I next redesign (Soon) i will have both sides on a rolling platform that will allow me to slide it out and maintain the plants.
Nice design and well thought out.